Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2006-08-15
2006-08-15
Pham, Chi (Department: 2668)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C455S013400
Reexamination Certificate
active
07092410
ABSTRACT:
An apparatus for measuring data transmission performance through a packet switched network, the apparatus having a time of day (TOD) clock for determining a send TOD timestamp, and for determining a present TOD when a data packet returns to the sending apparatus. The apparatus further comprising a counter that is incremented by a send sequence number each time data is sent, and one or more subtractors for calculating a first time difference between the send TOD timestamp and a receive TOD timestamp, and for calculating a second time difference between the receive TOD and the present TOD. Additionally, one or more comparators of the apparatus compare a sequence difference between the send sequence number and a receive sequence number in order to measure data transmission performance.
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Bordonaro Frank G.
Raparla Satyanarayana Rao
Zhang Kui
Cisco Technology Inc.
Jones Prenell
Marger Johnson & McCollom
Pham Chi
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